Soy nuevo en Android y estoy usando aChartEngine para crear un gráfico de barras. Quiero capturar los valores xey cuando un usuario hace clic en el gráfico. He visto las demostraciones de aChartEngine y mi gráfico se está creando bien. Sin embargo, onClickListner no funciona cuando hago clic en la gráfica. He definido el oyente en el método OnResume pero no funciona. Cualquier idea sería muy apreciada. ¿Me estoy perdiendo de algo

Aquí está mi método OnResume que se toma de XYChartBuilder

@Override
protected void onResume() {
  super.onResume();
Toast.makeText(Clickable2.this, "In OnResume", Toast.LENGTH_SHORT).show();

  if (mChartView == null) {     

Toast.makeText(Clickable2.this, "mChartView is null", Toast.LENGTH_SHORT).show();      

    LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
    mChartView = ChartFactory.getBarChartView(this,mDatasetMethod(titles,x,values),renderer,Type.DEFAULT);
    renderer.setClickEnabled(true);
    renderer.setSelectableBuffer(100);

    //OnClickListener
    mChartView.setOnClickListener(new View.OnClickListener() {
     // @Override
      public void onClick(View v) {
 Toast.makeText(Clickable2.this, "ON CLICK", Toast.LENGTH_SHORT).show();              
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
        double[] xy = mChartView.toRealPoint(0);
        if (seriesSelection == null) {
          Toast.makeText(Clickable2.this, "No chart element was clicked", Toast.LENGTH_SHORT)
              .show();
        } else {
          Toast.makeText(
                  Clickable2.this,
              "Chart element in series index " + seriesSelection.getSeriesIndex()
                  + " data point index " + seriesSelection.getPointIndex() + " was clicked"
                  + " closest point value X=" + seriesSelection.getXValue() + ", Y=" + seriesSelection.getValue()
                  + " clicked point value X=" + (float) xy[0] + ", Y=" + (float) xy[1], Toast.LENGTH_SHORT).show();
        }
      }
    });

    //LongClickListener
    mChartView.setOnLongClickListener(new View.OnLongClickListener() {
    //  @Override
      public boolean onLongClick(View v) {
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
  Toast.makeText(Clickable2.this, "ON LONG CLICK", Toast.LENGTH_SHORT).show();   
        if (seriesSelection == null) {
          Toast.makeText(Clickable2.this, "No chart element was long pressed",
              Toast.LENGTH_SHORT);
          return false; // no chart element was long pressed, so let something
          // else handle the event
        } else {
          Toast.makeText(Clickable2.this, "Chart element in series index "
              + seriesSelection.getSeriesIndex() + " data point index "
              + seriesSelection.getPointIndex() + " was long pressed", Toast.LENGTH_SHORT);
          return true; // the element was long pressed - the event has been
          // handled
        }
      }
    });

    mChartView.addZoomListener(new ZoomListener() {
      public void zoomApplied(ZoomEvent e) {
        String type = "out";
        if (e.isZoomIn()) {
          type = "in";
        }
        System.out.println("Zoom " + type + " rate " + e.getZoomRate());
      }

      public void zoomReset() {
        System.out.println("Reset");
      }
    }, true, true);

    mChartView.addPanListener(new PanListener() {
      public void panApplied() {
        System.out.println("New X range=[" + renderer.getXAxisMin() + ", " + renderer.getXAxisMax()
            + "], Y range=[" + renderer.getYAxisMax() + ", " + renderer.getYAxisMax() + "]");
      }
    });

    layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
    boolean enabled = mDataset.getSeriesCount() > 0;
  } else {
    mChartView.repaint();
 Toast.makeText(Clickable2.this, "mChartView is NOT null", Toast.LENGTH_SHORT).show();  
  }
}